Controlling mechanism



Jan. 24, 1928. 1,657,200

L. J. CLAPP CONTROLLING MECHANISM OI izinal Filed Oct? 14, 1921 Patented Jan. 2 1928' UNITED stares issuer Parent OFFICE.

LEW"

CHINERY CGM'EAI'IY,

outer, or onannutonr, new nearest-tine, 'ro suLmvAn MA- a conrona'rron or MASSACEUETTS;

CQNTROLLING MECHANISM;

Application filed October'l, 1921, Serial My invention relates to controlling mech anisms.

lit has for its objectv to provide an improved controlling mechanism and more especially to providean improved controlling mechanism for a compressor or the like whereby the power supply to the compressor driving engine is controlled in an improveu manner.

In the accompanying drawings 1 have shown for purposes of illustration. one embodiment which my i ntion may assume in practice, the same being illustrated as applied to a compressor driven by a gas engine.

In these drawings,

Fig. 1 is a side elevation of a compressor. mechanism equipped withthis form of my invention.

Fig. 2 is a detail view partially in elevation andpartially in section and showing the controlling mechanism.

Fig. 3 is a detail sectional view showing the engine throttle valve.

Fig. 4 is detail sectional view on line l i of Fig. 1, showing. one of. the unloading}: mechanisms.

In this illustrative construction I have shown a portable compressor mechanism of the truck supported type mounted on a wheeled truck 1 and including a vertical compressor 2 driven by a gasoline motor 3 and discharging into a receiver l, the compressor herein being supplied with usual suction inlet valves 5 operable by usual unloading plungers 6.

In my improvement, it will be observed that the motor 8 carries a governor There in operatively connected to a shaft 8 driven by the motor and of any desired torm adapted upon excessive motor speed to project a normally retracted plunger 9,. shownin 2. to the right to engage a pin '10 carried on a disk 11 which is operatively connected 7 tea shaft or pivot 12 on a usual normally open. ported valve 13, disposed in the fuel supply conduit 14.- leading; to the motor, and thereby, through moving the ported valve to closed position, out down the speed of the motor to the desired. idling speed.

Cooperating with this governor operated controlling mechanism is also controlling mechanism responsive to receiver pressure.

and also operating upon "the valve 13. This mechanism, generally indicated at 15, is oi duced portion 24 into No. 507,775. Renewed August 26, 1927.

the type described and claimed in my Patout No. 1;l73,598,. dated Nov. 6, 1923. To this mechanism terminal or receiver pressure is supplied through a usual pilot valve 16 and a pipe 17 which in turn communicates with a chamber 18 from which receiver pressure is supplied to a cylinder 19 to pro-' pelt a piston 20 longitudinally of that cylinder and thereby push a spring connected normally retracted member 21, carried on thepiston. into engagement with a pin 22 on the disk 11 to, move the valve 13 to idling position; pressure fluid at the same time besupplied through avalve 23, a reduced portion 2st on the piston 20; and piping 25,

to the suction valve plungersfi to open the valves 5 to unload the compressor. As in my. previous application, when the receiver pressure falls below a predetermined point,

the piston 20 moves backward first releas- As a result of my improvement it willbe 5 observed that: means are provided whereby not only is the fuel supply valve of the motor controlled by. an excessive speed governor in such a manner as to decrease-the fuel supply automatically whenever the'motor speed is unduly increased. but that the same valve is further controlled by cooperating controllingmeans responsive toreceiver pressure which act automatically to out down the fuel supply to the motor and thereby reduce its speed whenever the compressor is unloaded and which further cause the motor to be brought upto speedzbetore the compressor is again loaded.

-While I have in this application sptioifi-lfifl cally described one $01 111: which my inven tion may assume in practiceyit will'be'understood that this form otthe saline is-shown for purposes of illustration and that the invention may be modified and embodied in it. In compressor System; combinm In It will 80 tion, a compressor, an internal combustion compressor driving engine, and controlling means comprising a. cylinder, a piston therein, an engine intake throttle actuated by the piston adjacent the limit of movement of the latter, fluid operated compressor unloading means supplied with pressure on initial movement of said piston and vented by said piston as the latter returns to its initial position, and speed responsive means also controlling said intake throttle valve.

2. In a controlling mechanism for a compressor system comprising a compressor and an internal combustion driving engine therefor, in combination, a valve controlling the fuel supply to said engine, means operative on fluid supply thereto to unload a compressor and operative on release of fluid so supplied to permit reloading, and means for controlling such fluid supply and exhaust including a member reciprocable under fluid pressure and constituting an exhaust controlling valve, said reciprocable member being operative to control said fuel controlling valve in the interval between unloading of the compressor and its reloading.

3. In a controlling mechanismfor a compressor system having a driving motor, a compressor and a pressure ,fiuid actuated unloader for the compressor, in combination, controlling means for the motor including a controlled element, aservo-motor for actuating the same, means whereby a portion of said servo-motor operates as a control for the fluid pressure of said unloacler and controls the 'loading operation thereof, and speed responsive means also for controlling said controlled element.

4. In a controlling mechanism for a compressor system having a driving motor, a compressor and a pressure fluid actuated unloa dcr for the compressor, in combination, controlling means for the motor including a controlled element, a servo-motor for actuating the same means whereby a portion of said servo-motor operates as a control for thefluid pressure of said unloader and controls the loading operation thereof, and speed responsive means also for controlling said controlled element independently of said servo-motor.

5. In a controlling mechanism for pump movement of said member to said throttle including a pivoted member, whereby move ments of the speed governor and the longitudinally movable member of the pressure fluid device in opposite directions move the throttle in the same direction.

6. In a controlling mechanism for pu1nping apparatus which includes a compressor and a driving motor for the compressor, controlling means for the driving motor whereby the latter controlled in accordance with the compressor discharge pressure and also by speed responsive means, including a pivoted throttle valve and controlling means for the latter including a member movable by compressor discharge pressure and an element movable 'in accordance with variations in speed of the compressor driving motor, said member and element having axes disposed in a common plane to which the pivotal axis of the throttle valve is substantially perpendicular.

7. In a controlling mechanism for a compressor system having an internal combustion driving engine, a compressor, and a fluid pressure operated unloader for the in combination, controlling means for said engine including a fuel intake throttle valve, a servo-motor for actuating the same, and means whereby a portion of said servo-motor operates as a control for the fluid pressure for said unloadcr and controls the loading; operation thereof.

8. In a controlling mechanism for a compressor system having an internal combus tion driving engine, a compressor, and a fluid pressure operated unloader for the compressor, in combination, controlling means for said engine including a fuel intake throttle valve, a servo-motor for actuatinp; the same, and means whereby a portion of said servo-motor operates as a con trol tor the fluid pressure tor said unloadcr and controls the loading; operation thereof, and speed responsive means for controlling said intake throttlevalve.

9. In a controlling n'icchanlsiu For a compressor system comprising: an internal conr bustion motor, a compressor, and an unloader therefor adapted for. fluid pressure control. the vcon'ibiiuition including motor controlling means including a fuel intake throttle valve. speed responsive actuating; means therefor, and a servo-motor For iudcpendcntly actuating said throttle valve. said servo motor beinp ru-ovidcd with *alvc means initially operated by fluid pressure and controlling the fluid pressure tor the unloader.

10. In a controlling mechanism for a noun pressor system comprising an internal coinbustion motor, a compressor, and an unloader therefor adapted for fluid pressure control. the combination including motor controlling means including a fuel intake Inn member whose movement also controls the loading of the compressor, and an independ ent engine speed responsive means likewise controlling said valve. I

12. In a compressor controlling mechanism,a compressor having inlet valves, n driving engine therefor having a fuel conduit and a valve therein, and means for operating said valve including a plurality of pins movable withsaid valve and a plurality of plungers engageable with said pins, one of said plungers being movable in response to variations in engine speed, and the other in response to variations in compressor terminal pressure.

13. In a controlling mechanism for a co1n pressor system having a driving motor and compressor, in combination, controlling means for the motor comprising a rotatable element having portions extending laterally and on opposite sides of the axis thereof, a speed responsive device adapted to engage one of said portions, and a device responsive to compressor pressure fluid engaging the other projection for controlling said motor controlling means. i

14. In a controlling mechanism for a com pressor system having a driving motor and compressor, in combination, controlling means for the motor comprising an element having lateral portions each movable in a predeterminedpath, and means adapted to engage and actuate said portions and dis-v posed substantially tangential to certain portions of said paths.

15. In combination, a compressor, a driving motor therefor, and means for control.- ling said motor including speed responsive and pressure fluid devices, and an element controlled thereby for controlling said motor, said devices having actuating elements movable in opposite directions to produce independently of each other the same effect upon said controlled element.

16. In combination, a compressor, adriving motor therefor, speed responsive and pressure fluid devices for controlling said motor, and an element controlled thereby for controlling said motor, said devices having elements movable in substantially parallel directions but having their longitudinal axes disposed laterally of each other and which are operable to effect control of said elements devices having elements arranged to cooperate with said motor controlling element and movable in parallel directions but having their longitudinal axes disposed laterally of each other.

1.9. In combination, a compressor, a driving motor therefor, speed responsive and pressure fluid actuating devices, and an element controlled. by each of said devices for controlling said motor, each of said devices being capable of taking simultaneously their full operative position whereby a like effect is produced on said controlled element.

20. In combination, a compressor, speed responsive and pressure fluid devices, and an element adapted to have a like controlling eii'ect produced thereon by each of said devices, said devices being each capable of taking simultaneously their respective tull operative position while said effect is being produced.

21. In combination, a compressor, speed responsive and pressure fluid devices, and an element adapted to have a like controlling erlect produced thereon by each ot-said devices, said devices being capable of taking simultaneously their respective full ope z.- i

tive position while said effect is being produced and each of said devices having movable elements whose axes are laterally dislll posed to each other and are adapted to move in parallel directions.

22. In a controlling mechanism for pump ing apparatus which includes a compressor and a driving motor therefor, said motor having a control element, in combination, a speed responsive device and a pressure fluid device each adapted to move the control element of the motor, devices having members movable in substantially parallel but opposite directions whereby to move the control element ot-the motor in the,

same direction.

H3. in controlling meclrmism :tor pumping apparatus which includes a compressor and a driving motor therefor, said motor having a control element, in combination, a speed responsive device and a pressure fluid device each adapted independently of the other to move the control element or the motor, said devices havingmembers movable in substantially parallel but opposite directions whereby to move the control element of the motor in the same direction.

24.111 controlling mechanism for pumping apparatus which includes a compressor and a driving. IllQtOlflllllBl'BfOl, saidmotor having; a control element, in combination, a speed responsive device and a pressure fluid device each adapted independently of the other to move the controlelement oi the motor said devices having movable members Whose longitudinal axes are disposed laterally of each other, said members being movable in substantially parallel but opposite directions and connected to the control element oi. the motor to move the said element in the same direction.

25. In combination, a compressor driven by a motor having; a control element, a speed responsive device and a pressure fluid device each having a movable member for transwith a lost motion connection with the said control element to cnablethe speed respon- F ve device and the pressure fluid devlce to take simultaneously their full operative positions. a a

26.111 combination, :1 compressor driven by a motor having a control element, a speed responsive device and a pressure fluid device each having; a movable member, the axis of one movable memhen being laterally disposed with respect to the other, the said movable memhifurther being each pm vided with a lost motion connection with the said control elei'nent ivlml'cliiy the control element may he moved by both devices in the same direction and ivllerehy the speed responsive device and the pressin'e fluid device may take simultaneously their :it'ull operative positions.

In testimony whereof I afiix my signature.

LEWIS J. OLAPP.

GERTIFIGATE Q5 (IQRREGTEQN.

Patent N06 1,657,200 Granted January 24, 1928, to

LEWIS J CLAPP.

It is hereby certified that emm" agipeers in eke printed specification of the above numbered patent requiring cora'eetion as follows: Page 3, lines 80 and 81, claim 18, strike out the words "directly am! independently controlled by each of said devices" and in-sen flee same to foiiow after the word "element" in line 82; and that the said Letters Patent shouid be read with this correction therein Him: the same may cenform to the record of the ease in the Patent Office.

Signed and sealed this 20th day of March, A. D. 1928,

M. J. Moore,

Seal. Acting Commissioner of Patents. 

